/* base.css
 * Resets, color system, typography, login screen.
 * Dark theme with Millsaps purple (#3D2B99) as primary. */

* { box-sizing: border-box; margin: 0; padding: 0; }

:root {
  --bg-900: #0B0820;
  --bg-800: #12102C;
  --bg-700: #1A1838;
  --bg-600: #242048;
  --surface: #1C1934;
  --surface-elevated: #252144;
  --border-base: #2E2860;
  --border-focus: #5A43CC;

  --primary: #3D2B99;
  --primary-hover: #4D37BC;
  --primary-dim: #2A1F6E;
  --accent: #9A8BE8;
  --accent-warm: #E8B84A;

  --text-100: #F3F0FF;
  --text-200: #CFC7EA;
  --text-300: #8880BB;
  --text-400: #5F5890;

  --success: #4ED296;
  --warn: #F2C14E;
  --error: #E86A6A;

  --radius-sm: 6px;
  --radius-md: 10px;
  --radius-lg: 16px;

  --shadow-soft: 0 4px 12px rgba(0,0,0,.25);
  --shadow-strong: 0 8px 28px rgba(0,0,0,.4);
}

body {
  background: var(--bg-900);
  color: var(--text-100);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  font-size: 15px;
  line-height: 1.5;
  min-height: 100vh;
}

body.has-field-bg {
  background-image: linear-gradient(rgba(11, 8, 32, 0.88), rgba(11, 8, 32, 0.95));
  background-size: cover;
  background-position: center;
  background-attachment: fixed;
}

h1, h2, h3, h4 { font-weight: 700; color: var(--text-100); }
h1 { font-size: 24px; }
h2 { font-size: 20px; }
h3 { font-size: 16px; }

small { color: var(--text-300); font-size: 12px; }
a { color: var(--accent); }

/* ---------- Login screen ---------- */

.login-screen {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 24px;
}

.login-card {
  width: 100%;
  max-width: 420px;
  background: var(--surface);
  border: 1px solid var(--border-base);
  border-radius: var(--radius-lg);
  padding: 32px 28px;
  box-shadow: var(--shadow-strong);
}

.login-logo {
  display: flex;
  justify-content: center;
  margin-bottom: 16px;
}
.login-logo img {
  width: 72px;
  height: 72px;
  object-fit: contain;
}

.login-title {
  text-align: center;
  margin-bottom: 4px;
}
.login-sub {
  text-align: center;
  color: var(--text-300);
  margin-bottom: 24px;
  font-size: 13px;
}

.login-tabs {
  display: flex;
  gap: 4px;
  margin-bottom: 20px;
  padding: 4px;
  background: var(--bg-800);
  border-radius: var(--radius-md);
}
.login-tab-btn {
  flex: 1;
  background: transparent;
  color: var(--text-300);
  border: none;
  padding: 10px;
  border-radius: var(--radius-sm);
  font-size: 13px;
  font-weight: 600;
  cursor: pointer;
  transition: all .15s;
}
.login-tab-btn.active {
  background: var(--primary);
  color: var(--text-100);
}

.login-form { display: flex; flex-direction: column; gap: 12px; }

.form-field {
  display: flex;
  flex-direction: column;
  gap: 6px;
}
.form-field label {
  font-size: 12px;
  font-weight: 600;
  color: var(--text-200);
  text-transform: uppercase;
  letter-spacing: .5px;
}
.form-input {
  background: var(--bg-800);
  color: var(--text-100);
  border: 1px solid var(--border-base);
  border-radius: var(--radius-sm);
  padding: 10px 12px;
  font-size: 14px;
  font-family: inherit;
  transition: border-color .15s;
}
.form-input:focus {
  outline: none;
  border-color: var(--border-focus);
}

.btn-primary {
  background: var(--primary);
  color: var(--text-100);
  border: none;
  padding: 12px 16px;
  border-radius: var(--radius-sm);
  font-size: 14px;
  font-weight: 600;
  cursor: pointer;
  transition: background .15s;
}
.btn-primary:hover { background: var(--primary-hover); }
.btn-primary:disabled { background: var(--primary-dim); cursor: not-allowed; }

.login-err {
  color: var(--error);
  font-size: 12px;
  min-height: 16px;
  text-align: center;
}

.login-footer {
  margin-top: 16px;
  text-align: center;
  font-size: 11px;
  color: var(--text-400);
}

/* ---------- Loading state ---------- */

.loading {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  min-height: 100vh;
  gap: 12px;
}
.loading-spinner {
  width: 40px;
  height: 40px;
  border: 3px solid var(--border-base);
  border-top-color: var(--primary);
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
}
@keyframes spin { to { transform: rotate(360deg); } }
.loading-text {
  color: var(--text-300);
  font-size: 13px;
}